/*
 * Copyright 2020-present the original author or authors.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      https://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.springframework.graphql.data.query;


import graphql.schema.DataFetchingEnvironment;

import org.springframework.data.domain.Sort;

/**
 * Strategy to extract {@link Sort} details from GraphQL arguments.
 *
 * @author Rossen Stoyanchev
 * @since 1.2.0
 */
public interface SortStrategy {

	/**
	 * Return a {@link Sort} instance by extracting the sort information from
	 * GraphQL arguments, or {@link Sort#unsorted()} otherwise.
	 * @param environment the data fetching environment
	 */
	Sort extract(DataFetchingEnvironment environment);

}
